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Finding the Fourth Proportional to 545.28, 752.22 and 379.64

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Solution

The fourth proportional to 545.28, 752.22 and 379.64 is: 523.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.28 : 752.22 = 379.64 : x
  2. Step 2: Convert to fraction form
    545.28/752.22 = 379.64/x
  3. Step 3: Cross multiply
    545.28x = 752.22 × 379.64
  4. Step 4: Simplify right side
    545.28x = 285,572.80
  5. Step 5: Solve for x
    x = 285,572.80/545.28
  6. Step 6: Final answer
    x = 523.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.